Electrical-contact mechanism



(No Model.)

J. F. BLAKE. ELECTRICAL CONTACT MBCHANISM.

Patented NCVpZ?, 1804.

WH'NESSES:

, UNITED STATES PATENT Erica.

JOHN FEGGETTER BLAKE, OF NEW HAVEN, CONNECTICUT.

ELECTRICAL-CONTACT NIECHANISM.

SPECIFICATION forming part of Letters Patent No. 530,004, dated November27, 1894.

Application tiled .Tune 21, 1894. Serial No. 515.272. (No model.)

170 civ/ZZ whom t may concern,.-

Be itkuown that I, JOHN FEGGETTER BLAKE, a citizen of the United States,residing at New Haven, in-the county of New Haven and State ofConnecticut, haveinven'ted new and useful Improvements inElectrical-Contact Mechanism, of which the following is a specification.

This invention relates to certain improvements in electrical contactmechanism, and the object of the invention is to obtain a contactmechanism which will make Irm and reliable connection and clean breaks,and the invention resides in the novel features of construction setforth in the following specification and claims and illustrated in theannexed drawings, in which-- Figure l is a front elevation ot' thecontact mechanism. Fig. l.

In the drawings the letters A B indicate electrical conductorsconnecting with the opposite poles of a battery or generator. (Notshown.) The conductor A extends to a binding post C which with variousother parts is advantageously supported on a slab or support D of stoneor non-combustible material which will avoid the danger of lire fromarcs or sparking.

From binding post C extends a conductor E to binding post E whenceconductor G extends to the pump or motor`I-I, the return conductorIextending from the motor to binding post K whence conductor L extends toarm or rod M carrying a contact or spring finger N. The contact or`spring finger O is carried on arm or rod P whence conductor Q extends tobinding post R with which conductor B communicates.

From conductor E extends a branch S to the electro magnet T. The branchcurrent flowing through the coil of magnet T passes thence alongconductor U to a contact V supported on the insulator or glass face W ofa pressure gage X. This contact or stud V can be moved by the rotationof the glass or crystal W so as to come opposite any desired figure onthe gage dial, and as the index Y of the gage rests against said stud Vsaid index will be set or moved with the stud and will remain in contactwith the stud until the pressure indicated by the gage exceeds thatindicated Fig. 2 is a section along :c

by the figure to which the stud V and index Y have been set by therotation of the glass .W. The index Y communicates with conductor Zextending to conductor Q. The armaturea of electro magnet T carries astud or axle b on which the rotary disk c is eccentrically mounted.Supposing the conducting index Y to contact with V then the currentpasses along conductors A E S U Y Z Q and B so as to vitalize magnetTwhereupon armature a is attracted to force disk c into contact with thefingers N O so that a current can pass along conductors A E G to motorH, and return along conductors I L through contacts N c O and alongconductors Q B. Should the axle or shaft b of disk cnot be placedaccurately midway between contact fingers N O, the eccentric disk ccontacting in consequence rst with but one of said ngers will by suchone sided contact be rotated or swung on shaft b so as to make accuratecontact also with the other finger. Should the armature of, be releasedso as to move away from magnet T and the disk c stick or adhere somewhatto one of the .fingers N or O the movement of shaft b with armature aaway from vinagnetT will cause disk c to promptly break contact with theother linger. The device thus secures firm and reliable contact as alsoclean breaks. The coil of magnet T can be made to serve as a resistanceso that the greater part of the current will pass along conductor Gtoactuate motor H, or if desired other resistances could be placed in thecircuit of branch S. Supposing the glass WV is turned to make contact Vcarry index Y to indicate for example the figure l0 and the pump H to beforcing air or pressure through connections d e f g h into a cask orreceptacle (not shown), then as soon as the generated pressure exceedsthe figure indicated by index Y, such pressure passing to the gagethrough connections i k will move the index Y beyond the said figure soas to break the contact with post V, whereupon the magnet T becomingdevitalized will release armature a so that disk c breaks contact Withfingers N O to break the circuit actuating pump H. If the pressure intubes h g i Za drops to or below the desired figure the index Y willmove back to restore the circuit vitalizing magnet T IOO which thenactuates its armature to cause disk c to close the circuit at thefingers N O whereupon the pump [I is again started.

In order thatvany pressure `generated or remaining in tubes g h will notoppose the starting of the pump or motor I-I, a check valve Z is placedbetween tubes or conduits d e which valve allows the generated pressureto pass from the pump to tube h, While shutting` such generated pressureoff from tube d and from the pump when the latter has stopped, thegenerated or remaining; pressure however being left free to act in tubesh g 7,' lt so as to act on index Y.

Vhat I claim as new, and desire to secure by Letters Patent, is-

l. A base or support and a pressure actuated index, combined with acircuit closer actuated by said index, an electro magnet,an armatureactuated by the electro magnet, and a second circuit closer composed ofan arm or shaft carried by the armature, an eccentric disk rotatablymounted on said shaft, and contacts placed Within reacb of the eccentricdisk and serving to turn the latter and cause it to make accuratecontact with both contacts, substantially as described.

2. A circuit closer comprising a suit-ably actuated arin or shaft, arotatable disk eccentrically mounted on the shaft, and contacts placedwithin reach of the eccentric disk and adapted to be rotated by one ofthe contacts for causing it to make accurate contact with both contacts,substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing Witnesses.

JOIIN FEGGETTER BLAKE.

fitnessesz CHARLES F. BOLLMANN, RICHARD F. JAHN.

